New revelations are being brought to light about Trump, his advisers, and their connections with Russia. A new explosive book was released on Tuesday, which details just why former foreign policy adviser George Papdopoulos is a key witness for Special Counsel Robert Mueller’s investigation.

‘George Papadopoulos, a former foreign policy adviser to the Trump campaign and potentially a key witness in special counsel Robert Mueller’s Russia probe, told federal investigators that before the election, Donald Trump personally encouraged him to pursue a summit with Russian President Vladimir Putin, according to a new book being published Tuesday.’

The book authored by Michael Isikoff and David Corn is titled “Russian Roulette: The Inside Story of Putin’s War on America and the Election of Donald Trump.” According to The Washington Post:

‘“Russian Roulette” is Corn and Isikoff’s account of how Russia consumed the 2016 presidential campaign — and the first year of Trump’s presidency. This is not the first writing partnership for these two. Their previous book, “Hubris,” appeared in 2006 and focused on the Iraq War. This latest collaboration delivers no real bombshells. No proof of collusion, no evidence that Russia changed the outcome of the 2016 election, no revelation that fundamentally revises our understanding of the trajectory of events. But “Russian Roulette” performs an important service in tracing how establishment Washington — policymakers, intelligence chiefs, journalists — came to understand that what Russia was (and reportedly is still) up to was not routine espionage.’

On March 31, 2016, a critical meeting of Trump’s foreign policy team took place where it is revealed that:

‘Papadopoulos first informed Trump and the then candidate’s other foreign policy advisers that he had contacts in Britain who could arrange a summit between the GOP candidate and Putin.’

Supposedly the idea was shot down by now-Attorney General Jeff Sessions, who was an Alabama senator at the time. However, Papadopoulos told Mueller’s team that Trump encouraged him and found the idea “interesting.” Yahoo News reported:

‘Trump looked at Sessions, as if he expected him to follow up with Papadopoulos, and Sessions nodded in response, the authors write. Sessions has said he has “no clear recollection” of the exchange with Papadopoulos. A White House official said that others at the meeting remember it differently than Papadopoulos.’

Back in the fall, Mueller indicted Papadopoulos and he pleaded guilty on charges of lying to the FBI. What is important about the March 2016 meeting is that the book reveals that it is the only known meeting between Trump and Papadopoulos.

The book details how Alexander Torshin, a deputy governor of Russia’s central bank, a close Putin ally, and his assistant Maria Butina put forth massive efforts “to curry favor with the Trump campaign,” which including their attempts to set up a Trump-Putin meeting in Moscow.

According to Yahoo:

‘Those efforts began as early as July 2015, when Butina showed up at FreedomFest, a conservative gathering, in Las Vegas, where Trump was speaking. During a Q&A session, Trump called on Butina, who asked him about his stance on Russia and the sanctions imposed by the Obama administration on the country — eliciting the first response from the new GOP candidate on an issue that was a top priority of Putin’s government.’

Trump said:

‘I know Putin. I believe I would get along very nicely with Putin, OK? I don’t think you’d need the sanctions.’

In the book, Isikoff and Corn wrote about Trump’s Las Vegas speaking event, saying:

‘How was it that this Russian woman happened to be in Las Vegas for that event? And how was it that Trump happened to call on her? And Trump’s response? It was odd, Bannon thought, that Trump had a fully developed answer. Priebus agreed there was something strange about Butina. Whenever there were events held by conservative groups, she was always around.’

Shockingly too, the book discloses how Torshin and Butina had close ties with the National Rifle Association. It was also brought to light that conservative activist Rick Clay tried to orchestrate a Trump-Putin summit during an international conference on persecuted Christians in Moscow, which was organized by evangelist Franklin Graham.

Clay wrote:

‘Please excuse the play on words, but this is HUGE! The optics of Mr. Trump in Russia with Franklin Graham attending an event of over 1000 World Christian Leaders addressing the Defense of Persecuted Christians accompanied by a very visible meeting between President Putin and Mr. Trump would devastate the Clinton campaign’s efforts to marginalize Mr. Trump on foreign policy and embolden him further with evangelicals.’

If what is chronicled in the book is true, what a bombshell.

WATCH: A new book called 'Russian Roulette' tackles connecting all of the dots about Russia and the Trump campaign.